Chinese Optics Letters, 2004, 2 (6): 06347, Published Online: Jun. 6, 2006
Flat-top phase-matched high-order harmonics in gas-filled cell
Abstract
Phase-matched high-order harmonic generation in Ar gas-filled cell is investigated experimentally. We obtain phase-matched 27th order harmonic driven by a commercially available solid-state femtosecond laser system at 0.55 mJ/pulse energy level and 1-kHz repetition rate. Moreover, we find that the spatial distribution of intensity of high-order harmonics is flat-top profile other than a Gaussian one under the condition of optimized conversion efficiency in the static gas cell.
Xinhua Xie, Zhinan Zeng, Ruxin Li, Yunpei Deng, Haihe Lu, Dingjun Yin, Zhizhan Xu. Flat-top phase-matched high-order harmonics in gas-filled cell[J]. Chinese Optics Letters, 2004, 2(6): 06347.